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WCS Zeta GX Disc Wheels

Wheel Size
Cassette Body


While the WCS Zeta GX wheels might be a new product for Ritchey, one could argue their development has been in process for nearly 50 years. Tom, often together with his mentor Jobst Brandt and other friends, has been blazing trails and riding rough stuff since the early 1970s. Riding dirt is literally in Tom's blood.

Directly inspired by the reliability and top performance of the original Ritchey Zeta wheels, the new WCS Zeta GX wheelset is designed to shine in the gravel. These hand-built wheels are tubeless-ready and feature the new WCS hub with sealed bearings, and center-lock rotor mounts – with the rear hub housing a precise Ratchet Driver system with 360-degree, 36-point engagement. The rims offer a wide 25mm inner diameter, so they'll nicely fit wider tires for gravel, and they're laced with 28 sturdy spokes.

Tom Ritchey doesn't carry a mobile phone when he rides. Nor does he bother with the hassle of following GPS coordinates on a cycling computer. A firm believer in self-reliance, one of Tom's guiding design principals is that every Ritchey product needs to be reliable enough to get you home. Designed for durability and to perform in rough and rugged conditions in remote locations or close to home, the WCS Zeta GX wheels are built to be strong, dependable, and ready to rip, carve, and cruise through all of your gravel adventures – and reliable enough to make sure you can do it all again tomorrow.

  • Rims: 6066 alloy Tubeless Ready with tubeless tape applied - OCR offset
  • Rim depth: 19mm
  • Outer rim width: 29mm

Tech Specs

Rims6066 alloy Tubeless Ready with tubeless tape applied - OCR offset
Rim diameters650b and 700c
Rim depth19mm
Outer rim width29mm
Inner rim width25mm
Suggested tire size range32-67mm
Hubsforged disc thru-axle hubs and sealed bearings 
Hub spacing100x12mm front / 142x12mm rear
Axle Compatibilitythru-axle (12-15mm) - standard quick release (conversion kits available separately)
FreewheelRatchet Driver with 36-point engagement
Freehub materialalloy
Freehub optionsShimano / SRAM XD-Road / Campagnolo (N3W and backwards compatible specs)
CompatibilityShimano 9-11 speed and 12 speed road cassette - SRAM XD/XDR - Campagnolo 10-13 speed (freehub conversion kits available separately)
For conversions to Shimano 11/12s or SRAM XDR, end caps (55050007035) must be purchased separately
Disc brake compatibilityCenterlock (hub center-lock lockrings available separately)
SpokesDT Competition 2.0/1.8 double butted
Front28 spokes / 2x lacing 
Rear28 spokes / 2x lacing
Nipples2.0 brass 12mm
Weight1740g/set (650b) - 1840g/set (700c) - with tubeless tape installed
Do not use sealants containing ammonia

Logic Features

TLR + Installed tape

TLR + Installed Tape

Tubeless ready rims with pre-installed tape.

OCR Rims

OCR Rims

Off-center spoke drilling offers equal spoke tension throughout the wheel resulting in an easily dished strong wheel.

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